/ Repairing Ruffwear dog harness tape

I'm posting this here as I know some of you make your own rucksacks etc.

My dog has chewed through one of the stomach straps on her Ruffwear harness. The straps are made of some sort of tape so tough a normal sewing machine won't go through it, and nor will a normal needle and thread. Can anyone recommend somewhere that can mend it for me? It's the 'last' strap, that goes round her stomach, and it's obviously designed to be super strong so that, when necessary, she can be lifted using the handle on top of the harness.